A. LUISIER - LES MOUSSES DE MADÈRE 



61 



Voici la description publiée par Mitten, d'après les 

 exemplaires de S. Miguel: 



« Caulis erectus simplex, inferne radicellis ferrugineis to- 

 mentosus; folia a basi subquadrata, superne latiora, ample- 

 xantia, patentia, sensim subulato-angustata, canaliculata, ápice 

 obtusiusculo subintegerrimo, nervo percurrente, marginibus 

 ad basin partis patentis sinuato-recurvis, cellulis in parte ere- 

 cta angustis elongatis pellucidis, in parte superiore patente 

 parvis ovalibus brevioribusque obscuriusculis : pericbaetialia 

 conformia, parum longiora; theca in pedúnculo purpúreo 

 oblongo-cylindraceainclinata subinaequalis laevis leptodermis, 

 operculo anguste subulato recto aequilongo, peristomio denti- 

 bus ad basin divisis, laciniis rubris punctulatis angustis. » 

 Mittten ajoute les remarques complémentaires suivantes: 

 «Stems in the Azorean specimens densely tufted, an inch 

 higb, the lower half raatted together with rusty rootlets; the 

 upper portion dull yellowish green, tinged with brown, scar- 

 cely altered when dry. Seta scarcely half an inch high. Ca- 

 psule of a red-brown colour and thin papery substance, about 

 a line long, at base tapering into the seta, inclined at an angle 

 of 45°; the operculum is of the same colour as the capsule; 

 and the peristorne, which is about onethird of the lenght of 

 the capsule, is composed of red teeth, which, after the fali of 

 the operculum, remain in an erect position ; the calyptra is 

 pale brown, ande reaches to the middle of the capsule» ('). 



La magnifique planche de la Bryologia atlântica, complète 

 admirablemente cette description. Rappelons que les espèces 

 connues de Rhamphiãium sont dioíques. 



Trichostomum Hedw. 

 Espèces atlantiques: 



T. azoricum Card. — Açores. 

 T. crispulum Bruch. — Madère. 



T. brachydontiurri Bruch. — Madère, Açores, Canaries. 

 T. littorale Mitt. — Madère, Açores, Ganaries. 



0) Godraan, Nat. Hist. of the Azores, p. 291. 



